Creator and Executive Producer Matt Groening signs a poster at the unveiling of the new "The Simpsons" U.S. postage stamps in Los Angeles on May 7, 2009. The first U.S. postage stamps were issued on July 1, 1847. File Photo by Jim Ruymen/UPI | License Photo

New York Gov. Franklin Delano Roosevelt rides in the back of an open top car with his daughter Anna Roosevelt Halsted (C) and wife Eleanor while campaigning in Warm Springs, Ga., on October 24, 1932. On July 1, 1932, Democrats nominated FDR for president. File Photo courtesy FDR Presidential Library

Opponents of Egypt's President Mohamed Morsi protest outside of the presidential palace in Cairo, Egypt, on July 1, 2013. Egypt's powerful armed forces gave Islamist President Morsi a virtual ultimatum on Monday to share power, urging the nation's feuding politicians to agree on an inclusive roadmap for the country's future within 48 hours. File Photo by Ahmed Jomaa/UPI | License Photo

July 1 (UPI) -- On this date in history:

In 1847, the first U.S. postage stamps were issued.

In 1859, the first intercollegiate baseball game was played in Pittsfield, Mass., and it was a high-scoring contest. Amherst beat Williams, 66-32.

In 1867, Canada was granted its independence by Great Britain. It consisted at the time of Nova Scotia, New Brunswick and future provinces of Ontario and Quebec.

In 1874, the Philadelphia Zoological Society, the first U.S. zoo, opened to the public.

In 1898, Teddy Roosevelt and his Rough Riders led a charge up Cuba's heavily fortified San Juan Hill in a key Spanish-American War battle.

In 1908, more than a thousand suffragettes in London attempted to rescue 28 of their fellow protesters who were arrested by police following a demonstration in Parliament Square.

In 1916, in the worst single day of casualties in British military history, 20,000 soldiers were killed and 40,000 injured in a massive offense against German forces in France's Somme River region during World War I.

In 1941, NBC broadcast the first FCC-sanctioned TV commercial, a spot for Bulova watches shown during a Dodgers-Phillies game. It cost Bulova $9.

In 1946, the United States conducted its first post-war test of the atomic bomb at Bikini Atoll in the Pacific.

In 1979, Sony introduced the Walkman, known as the Soundabout, in U.S. stores. It sold for about $200.

In 1985, the Motion Picture Association of America introduced the PG-13 rating to warn parents that a film may be too violent for children under the age of 13. A top U.S. Catholic Conference official said the move was just another way to exploit young people.